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Dyfyniad Arddull ChicagoWithrow, Jean 1937-. Effective Writing: Writing Skills for Intermediate Students of American English : Student’s Book. Cambridge [Cambridgeshire]: Cambridge University Press, 1987.
Dyfyniad MLAWithrow, Jean 1937-. Effective Writing: Writing Skills for Intermediate Students of American English : Student’s Book. Cambridge [Cambridgeshire]: Cambridge University Press, 1987.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.